W*dac is not a small outfit, they are one of the oldest and most established interior companies in the country. They have been installing Llumar (established US brand) solar films for my OFFICE projects for the past 20 years. No complaints. Good service, prompt attention to any minor issues that arose during their 10 year warranty. However I have NO experience on their car tints but if the quality is the same as their commercial installations it should be good.
Kleenpark used to deal in 3M products, have done a few commercial projects with them but they have had high staff turnover and their present staff is frankly rubbish...clueless with bad attitude, and I've no idea about the NDFOS product (they claim it is used in the Samsung displays but I don't see how this is relevant nor find any info on the same)...I think they messed up the 3M brand and had it removed from them and now peddling this Korean product...may be good or may be garbage, no idea. Not impressed. They claim the NDFOS product is 3M equivalent or better. I'd be a bit hard pressed to believe that.